A5003815835- Atmospheric chemistry and aerosols
- Atmospheric Ozone and Climate
- Atmospheric aerosols and clouds
- Climate variability and models
- Climate change and permafrost
- Cryospheric studies and observations
- Air Quality and Health Impacts
- Plant Water Relations and Carbon Dynamics
- Atmospheric and Environmental Gas Dynamics
- Meteorological Phenomena and Simulations
- Peatlands and Wetlands Ecology
- Smart Materials for Construction
- Vehicle emissions and performance
- Climate change impacts on agriculture
- Tree-ring climate responses
- Hydrology and Watershed Management Studies
- Plant Ecology and Soil Science
- Greenhouse Technology and Climate Control
- Botany and Plant Ecology Studies
- Fire effects on ecosystems
- Arctic and Antarctic ice dynamics
- Maritime Transport Emissions and Efficiency
- Land Use and Ecosystem Services
- Remote Sensing and Land Use
- Per- and polyfluoroalkyl substances research
Helmholtz-Zentrum Hereon
2022-2025
Climate Service Center
2012-2023
German Climate Computing Centre
2020-2021
Finnish Meteorological Institute
2012-2020
University of Helsinki
2016
Max Planck Institute for Meteorology
2012
Fischer (Germany)
2012
University of Eastern Finland
2007
Abstract The European CORDEX (EURO-CORDEX) initiative is a large voluntary effort that seeks to advance regional climate and Earth system science in Europe. As part of the World Climate Research Programme (WCRP) - Coordinated Regional Downscaling Experiment (CORDEX), it shares broader goals providing model evaluation projection framework improving communication with both General Circulation Model (GCM) data user communities. EURO-CORDEX oversees design coordination ongoing ensembles...
Abstract. Drought and heat events in Europe are becoming increasingly frequent due to human-induced climate change, impacting both human well-being ecosystem functioning. The intensity effects of these vary across the continent, making it crucial for decision-makers understand spatial variability drought impacts. Data on drought-related damage currently dispersed scientific publications, government reports, media outlets. This study consolidates data European forests from 2018 2022, using...
Abstract. This paper presents a new version of HCLIM, regional climate modelling system based on the ALADIN–HIRLAM numerical weather prediction (NWP) system. HCLIM uses atmospheric physics packages from three NWP model configurations, HARMONIE–AROME, ALARO and ALADIN, which are designed for use at different horizontal resolutions. The main focus is convection-permitting modelling, i.e. developing HARMONIE–AROME. In ALADIN configurations used coarser resolutions convection needs to be...
Abstract. Aerosol particles from shipping emissions both cool the climate and cause adverse health effects. The cooling effect is, however, declining because of emission controls aiming to improve air quality. We used an aerosol-climate model ECHAM-HAMMOZ test whether by altering ship fuel sulfur content, present-day aerosol-induced could be preserved, while at same time reducing premature mortality rates related emissions. compared effects a scenario (ship content 2.7%) with (1) simulation...
Abstract. The regional climate model REMO was coupled with the FLake lake to include an interactive treatment of lakes. Using this new version, Fenno-Scandinavian and characteristics were studied in a set 35-year hindcast simulations. Additionally, sensitivity tests related parameterization snow albedo conducted. Our results show that overall version improves representation terms 2 m temperature precipitation, but downside is existing wintertime cold bias enhanced. surface water temperature,...
Abstract Global and regional climate models (respectively GCMs RCMs) are delivering conflicting messages about summertime change in Europe, revealing notably a weaker warming RCMs. A dedicated multimodel ensemble of nine GCM‐RCM pairs is analyzed to assess the role anthropogenic aerosols these inconsistencies. The expected decrease aerosol concentrations found both modify future evolution shortwave radiation generate an extra warming. For every tenth optical depth drop Central increased at...
The representation of complex urban environments and their climates highlights a key advancement in present-day regional climate modeling. City differ from surrounding various ways, e.g., through increased temperatures reduced evapotranspiration. development convection-permitting model (CPRCM) simulations allow us to resolve areas climatic phenomena, such as the heat island effect, contrast rural surroundings more precisely. However, with increasing resolution, terrain characteristics cities...
Abstract. Land cover changes can impact the climate by influencing surface energy and water balance. Naturally treeless or sparsely treed peatlands were extensively drained to stimulate forest growth in Finland over second half of 20th century. The aim this study is investigate biogeophysical effects peatland forestation on regional Finland. Two sets 18-year simulations done with model REMO using land data based pre-drainage (1920s) post-drainage (2000s) Finnish national inventories. In most...
Abstract This study presents analysis of in situ measurements conducted over the period 2005–2014 Indian Himalayas to give a thorough overview factors and causes that drive aerosol properties. Aerosol extensive properties (namely, particle number concentration, scattering coefficient, equivalent black carbon, PM 2.5 , 10 ) have 1.5–2 times higher values early late afternoon than during night, strong seasonality. The interannual variability is ±20% for both total concentration. Analysis data...
High-quality climate information tailored to cities' needs assists decision makers prepare for and adapt change impacts, as well support the transition toward resilient cities. During last decades, two main modelling approaches emerged understand analyse urban generate information. Firstly, meso- microscale models commonly resolve street city scale (1m 1km) through simulating short "weather" type episodes, possibly under conditions. Secondly, regional (RCMs) are currently approaching...
Abstract. The prediction skill of the regional aerosol–climate model REMO-HAM was assessed against black carbon (BC) concentration measurements from five locations in Finland, with focus on Hyytiälä station for year 2005. We examined to what extent is able reproduce using several statistical tools: median comparison, overlap coefficient (OVL; common area under two probability distributions curves) and Z score (a measure standard deviation, shape spread distributions). results statistics...
To assess the impact of anthropogenic aerosol emission reduction on limiting global temperature increase to 1.5 °C or 2 above pre-industrial levels, two climate modeling approaches have been used (MAGICC6, and a combination ECHAM-HAMMOZ UVic ESCM), with control pathways under greenhouse gas (GHG) scenarios. We found that reductions associated CO2 co-emissions had significant warming effect during first half century near-term is dependent pace reduction. The results show these account for...
Abstract. Light absorbing impurities in snow and ice (LAISI) originating from atmospheric deposition enhance snowmelt by increasing the absorption of shortwave radiation. The consequences are a shortening duration due to increased and, at catchment scale, temporal shift discharge generation during spring melt season. In this study, we present newly developed algorithm for application hydrological models that allows an additional class input variable: mass flux various species light aerosols....
Abstract. REMO-HAM is a new regional aerosol-climate model. It based on the REMO climate model and includes most of major aerosol processes. The structure for similar to global ECHAM5-HAM, example module HAM coupled with two-moment stratiform cloud scheme. On other hand, does not include an online aerosol-radiation nor secondary organic module. In this work, we evaluate compare results against ECHAM5-HAM measurements. Four different measurement sites were chosen comparison total number...
Abstract. Climate–aerosol interactions in India are studied by employing the global climate–aerosol model ECHAM5-HAM and GAINS inventory for anthropogenic aerosol emissions. Model validation is done black carbon surface concentrations Mukteshwar features of monsoon circulation. Seasonal cycles spatial distributions radiative forcing temperature rainfall responses presented different setups. While total strongest summer, considerably stronger winter than summer. Local seasonal anomalies...
Abstract. The global aerosol–climate model ECHAM-HAMMOZ was used to investigate changes in the aerosol burden and radiative effects coming decades. Four different emissions scenarios were applied for 2030 (two of them also 2020) results compared against reference year 2005. Two are based on current legislation reductions: one shows maximum potential reductions that can be achieved by technical measures, other is targeted short-lived climate forcers (SLCFs). We have analyzed terms means...
Abstract. This work describes improvements in the regional aerosol–climate model REMO-HAM order to simulate more realistically process of atmospheric new particle formation (NPF). A scheme was implemented OH radical concentrations using a proxy approach based on observations and also accounting for effects clouds upon concentrations. Second, nucleation rate calculation modified directly rates 3 nm particles, which removes some unnecessary steps calculations used earlier model. Using updated...
Abstract. Irrigation is a crucial land use practice to adapt agriculture unsuitable climate and soil conditions. Aiming for improving the growth of plants, irrigation modifies condition, which causes atmospheric effects feedbacks through land-atmosphere interaction. These can be quantified with numerical models, as has been done in various studies. It could shown that effects, such air temperature reduction humidity increase are well understood should not neglected on local regional scales....
Abstract. In this paper, we evaluate the skill of road weather model RoadSurf to reproduce present-day conditions in Finland. was driven by meteorological input data from cycle 38 high-resolution regional climate (RCM) HARMONIE-Climate (HCLIM38) with ALARO physics (HCLIM38-ALARO) and ERA-Interim forcing lateral boundaries. Simulated surface temperatures were compared observations between 2002 2014 at 25 stations located different parts The main characteristics accurately captured study area....
This study presents an assessment of the impact black carbon (BC) regional emissions four Nordic countries (Denmark, Finland, Norway and Sweden – denoted henceforth as DFNS). The surface concentrations, radiative forcing BC-in-snow were calculated using ECHAM-HAMMOZ global aerosol-climate model and, where possible, evaluated with field observations. We found that is reproducing BC concentrations for most measurement sites considered within 1–2 standard deviations, only few exceptions. (top...
Abstract. Radiative transfer calculations in numerical weather prediction (NWP) and climate models require reliable information about aerosol concentration the atmosphere, combined with data on optical properties. Replacement of default input vertically integrated climatological depth at 550 nm (AOD550, Tegen climatology) newer data, based those available from Copernicus atmosphere monitoring service (CAMS), led to minor differences simulated solar irradiance screen-level temperature...
Abstract. Irrigation is a crucial land use practice to adapt agriculture unsuitable climate and soil conditions. Aiming improve the growth of plants, irrigation modifies condition, which causes atmospheric effects feedbacks through land–atmosphere interaction. These can be quantified with numerical models, as has been done in various studies. It could shown that effects, such air temperature reduction humidity increase, are well understood should not neglected on local regional scales....